<!DOCTYPE html>
<html>
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
	<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
	<style type="text/css">
		body, html,#allmap {width: 100%;height: 100%;overflow: hidden;margin:0;font-family:"微软雅黑";}
		body{position: relative}
		#box{position: absolute;left: 0px;top: 0px}
	</style>
	<script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=aWSoR5PtUroMlexve85I1otMn0sly5Qs"></script>
	<title>根据城市名设置地图中心点</title>
</head>
<body>
	<div id="box">
		<input type="text" value="搜索"><button>搜索</button>
	</div>
	<div id="allmap">		
	</div>
</body>
</html>
<script type="text/javascript">
	// 百度地图API功能
	var map = new BMap.Map("allmap");  // 创建Map实例
	map.centerAndZoom("北京",15);      // 初始化地图,用城市名设置地图中心点
</script>
